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Subjects
Science CBSE
Class 9
Structure of the atom
Discovery and structural models of atomic particles
2.
Discovery of subatomic particles
Exercise condition:
3
m.
1
.
The discovery of the proton is made by
James Chadwick
Eugen Goldstein
J. J. Thomson
Niels Bohr
2
.
All atoms have neutrons, except for
helium
hydrogen
lithium
None of these
3
.
Neutron has the charge of
\(0\)
\(-1\)
\(+1\)
\(+2\)
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